Comparison with External Galaxies Dynamics

Combes, F.

doi:10.1007/978-94-009-1687-6_17

Cited by 2 publications

(2 citation statements)

References 38 publications

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“…Therefore, both the thin bar and triaxial bulge put corotation at about 4.4 to 5 kpc. This is in agreement with the conclusions of Combes (1996). Galaxies with two, or even three, triaxial structures are known (see Friedli 1996 for a review) and the position angles of the various components can take any value (in fact, they are aligned only in a minority of cases).…”

Section: Introductionsupporting

confidence: 88%

Searching for the in-plane Galactic bar and ring in DENIS

López-Corredoira

Hammersley

Garzón

et al. 2001

A&A

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Abstract. New evidence for a long thin Galactic bar (in contradistinction to the bulge), as well as for the existence of the ring and the truncation of the inner disc, are sought in the DENIS survey. First, we examine DENIS and Two Micron Galactic Survey star counts for the characteristic signatures of an in-plane bar and ring. The star counts in the plane for 30• > l > −30• are shown to be highly asymmetric with considerably more sources at positive than at negative longitudes. At |b| ≈ 1.5• , however, the counts are nearly symmetric. Therefore, the asymmetry is not due to the disc, which is shown to have an inner truncation, or to the bulge, so there has to be another major component in the inner Galaxy that is causing the asymmetries. This component provides up to 50% of the detected sources in the plane between the bulge and l = 27• or l = −14• . This component is shown to be consistent with an in-plane bar with a position angle of 40• and half-length of 3.9 kpc. However, there is also a major peak in the counts at l = −22• , which coincides with the tangential point of the so-called 3 kpc arm. This is shown to be most probably a ring or a pseudo-ring. The extinction in the plane is also shown to be asymmetric with more extinction at negative than at positive longitudes. For l < 8• the extinction is shown to be slightly tilted with respect to b = 0• in the same manner as the HI disc. We conclude that the Galaxy is a fairly typical ringed barred spiral galaxy.

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Section: Introductionsupporting

confidence: 88%

Searching for the in-plane Galactic bar and ring in DENIS

López-Corredoira

Hammersley

Garzón

et al. 2001

A&A

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“…However, considerable theoretical, as well as observational, effort has been made toward understanding these processes (e.g. Shlosman et al 1990;Combes 1996;Knapen 2005). External and internal triggers of the fueling process can be distinguished.…”

Section: Fueling Of Nuclear Activitymentioning

confidence: 99%

Mrk 609: resolving the circumnuclear structure with near-infrared integral field spectroscopy

Zuther

Iserlohe

Pott

et al. 2007

A&A

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Aims. We present first results of near-infrared (NIR) J and H + K ESO-SINFONI integral field spectroscopy of the composite starburst/Seyfert 1.8 galaxy Mrk 609. The data were taken during the science verification period of SINFONI. We aim to investigate the morphology and excitation conditions within the central 2 kpc. Additional Nobeyama 45 m CO(1−0) data are presented, which we used to estimate the molecular gas mass. The source was selected from a sample of SDSS/ROSAT-based, X-ray bright AGN with redshifts of 0.03 < z < 1 that are suitable for adaptive optics observations. This sample allows for a detailed study of the NIR properties of the nuclear and host environments with high spectral and spatial resolution. Methods. Integral field spectroscopy with SINFONI delivers simultaneous spatial and spectral coverage of the circumnuclear environment. The NIR light is influenced less by dust extinction than by optical light and is sensitive to mass-dominating stellar populations. Furthermore, several NIR emission lines allow us to distinguish between Seyfert and starburst activities. Results. Our NIR data reveal a complex emission-line morphology that is possibly associated with a nuclear bar seen in the recon- Conclusions. High angular resolution imaging spectroscopy provides an ideal tool for resolving the nuclear and starburst contributions in active galaxies. We show that Mrk 609 exhibits LINER features that appear to be hidden in visible/NIR spectra with larger apertures.

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Comparison with External Galaxies Dynamics

Cited by 2 publications

References 38 publications

Searching for the in-plane Galactic bar and ring in DENIS

Searching for the in-plane Galactic bar and ring in DENIS

Mrk 609: resolving the circumnuclear structure with near-infrared integral field spectroscopy

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